Session 0023.0 — Transcript

App: human-experience-filter-art Start: 2026-06-26T09-05 (PST) End: 2026-06-26T09-20 (PST) Type: executing-plans (operator-driven debugging — "still can't hear" / "video didn't come on") Posture: yolo Claude-Session: e0cc053a-41fa-416d-a4f5-493f14984e75 Status: FINALIZED

Launch prompt (the thread)

"I still can't hear" → (after diagnostics) operator screenshot: audio: on, PAUSED (readyState 0) and "the audio check works" with ring=server · url=NONE → "the video didn't come on when I turned it on" → after the fix: "yes, both" (video and audio confirmed working).

Pre-state

Sessions 0020–0022 had shipped the audio/video feature + three "Safari autoplay" fixes that were verified only in headless browsers and did not work for the operator. Audio was silent; this session set out to find the real cause.

Session arc — the debugging

Stop guessing; instrument. Three blind fixes had failed because headless Playwright (Chromium and WebKit) relaxes autoplay, so the bug was never reproducible. Added a live #audio-status readout (surfacing the previously swallowed play() errors + aud.error) and a native <audio controls> test player that plays the file with zero app code involved. Confirmed the server already honors HTTP Range (206) + audio/mpeg — not a serving problem.
The decisive readout. Operator reported: the native player works (file + codec + browser audio all fine), but the toggle showed ring=server · url=NONE with readyState 0 and no media error — meaning my code never set a source because soundtrackUrl() returned null.
Root cause = a STALE uvicorn server. The operator's Python process predated the 0020 audio/video work, so it (a) returns /api/ring without the per-scale audio field, and (b) requires the old 7-way content — it 422s the new {visual,audio} payload and returns {content:{video}} instead of {render:{video:{shown}}}. So audio had no url AND the Video toggle's POST failed (→ "video didn't come on"). Reloading never fixes it (only refreshes static assets, not the Python process).
Fix = make the client resilient to a stale server (so no restart is needed):
- soundtrackUrl() falls back to a scale-id→file map (SCALE_AUDIO_FALLBACK, mirrors build_pool_manifest.SCALE_AUDIO).
- controls() also sends a back-compat content field (current server ignores it; an old one ignores visual/audio).
- update() reads "video shown" from either response shape. Verified end-to-end against a simulated fully-stale server (routed old /api/alteration shape + stripped ring audio) in Chromium and WebKit: Video on → video shows + soundtrack plays, zero errors. Operator confirmed "yes, both".
Cleanup. Tucked the audio diagnostics (status readout + native player) under the Dev Mode panel — kept for future debugging, out of the installation UI.

Deferred decisions

No low-confidence calls. One judgment worth noting: I added permanent client back-compat for a pre-release internal API to unblock the operator without a server restart. The clean long-term fix is restarting the dev server; the shim is harmless and removes the dependency. Flagging in case a future cleanup wants to drop it once servers are reliably current.

Cut state

main @ 6427ab4, clean, pushed. 292 tests + 7 Playwright E2E pass (2 skipped).
Audio + Video experience works and is operator-confirmed on the real device.
New E2E regressions: stale-ring soundtrack fallback, audio-then-video ordering.
The operator's actual server is still stale — recommended (not required) they restart it so the API is current; the client no longer depends on it.

Operator plate / lesson

The big lesson (recorded in memory): headless Playwright relaxes BOTH autoplay and GPU compositing, so it cannot reproduce real-browser/real-server issues. When a fix "passes headless" but the operator still sees the bug, instrument with on-screen readouts + a native control to get their real data — don't ship another blind guess. Three rounds were lost to this before instrumenting.

Next /goal

/goal source/compose the deferred per-altitude music layer (the reserved Audio dial position) per docs/audio-candidate-pool.md — the Audio+Video experience is working & operator-confirmed; OR re-enable white-noise as a 3rd Audio position if wanted

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